My chickens and until recently the geese stayed out of my neighbor's corn field. But the ducks I recently got and now my geese keep going into the field and eating the leaves off of the corn stalks. Fencing the the whole area would be extremely pricey. I keep chasing them out, yelling while I do so, but they keep coming back. Any suggestions for how to keep them out? My neighbor has hundreds of acres so I'm hoping he doesn't get too mad about the little bit of eaten down corn stalks.